Dr. March was the father of Francine Langstrom and the father-in-law of Kirk Langstrom. A zoologist specializing in the study of bats, Dr. March was described as liking bats better than people, something that made Bruce Wayne like him quite a bit in spite of his outright unfriendly behavior.
He worked at the Gotham Zoo where he and his son-in-law developed a formula to create a new species that was neither man nor bat. This led to the creation of the Manbat. Although Batman stopped the monster and turned the Manbat back into Kirk again, March stubbornly continued his research with the formula in the hopes of perfecting it. After his own daughter Francine accidentally ingested the chemicals and became a monster, March is thought to have given up his experiments.